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Wir gratulieren Prof. Stefan Müllegger zum ERC Consolidator Grant!

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Best Poster Award for V. Ney and A. Ney at the MMM Conference 2017 in Pittsburgh

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AIP Scilight of Rev. Sci. Instrum. 88, 093703 (2017)

AIP Scilight of Rev. Sci. Instrum. 88, 093703 (2017)

Staatspreis Patent 2016 für Prof. Alberta Bonanni

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New professor at the Solid State Physics Division - congratulations!

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Wir gratulieren Assoc. Prof. Dr. Stefan Müllegger zur Habilitation!

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Cover page of Phys. Rev. Lett. 113 133001 (2014).

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Position Indication:


Transnational D-A-CH Project I 2030-N36: "Element specific spin dynamics of nano- and heterostructues studied with ultimate spatial resolution"

Funding: Austrian Science Fund (FWF), Deutsche Forschungsgemeinschaft (DFG)

Project period: 1.2.2017 - 31.1.2020

Work groups: Linz  Duisburg


Conference Contributions:

Project description: The rapid progress in miniaturization of computational devices over the past decades has pushed the limits towards ever-smaller structures and ever-faster operation at the same time. Current technology is already close to the fundamental limit of the atomic length-scale. Thus, various novel concepts have been put forward to further increase performance not by miniaturization but via increased functionality. This includes the fields of spintronics and magnonics which have in common that they involve the quantum-mechanical spin degree of freedom. Consequently, also in the field of magnetism this demands investigating ever-smaller spatial dimensions and increasingly faster time-scales to be able to study spin dynamics, which is typically in the GHz regime, at the nanometer scale. The aim of this proposal is to carry out investigations of the dynamic magnetic properties of individual magnetic micro- and nano-objects in a complex magnetic environment. For that a unique novel instrument will be used which allows element specific investigations of magnetism using a combination of a scanning transmission x-ray microscopy (STXM, lateral resolution down to 35 nm) with time-resolved (down to 17 ps), x-ray detected ferromagnetic resonance (FMR). In particular, STXM-FMR enables to directly map the intrinsic magnetic properties of individual micro- and nano-objects as well as of individual magnetic nanoparticles under the influence of a tailored surrounding ensemble of other magnetic particles or structures. Those typically lead to complex inhomogeneous local fields originating from dipolar or indirect magnetic coupling. On the other hand, the induced dynamic spin polarization generated in a non-magnetic material by spin-pumping from an adjacent ferromagnet at magnetic resonance shall be imaged directly for the first time to study its spatial distribution and phase correlation with the resonating ferromagnet. Comparing the findings of STXM-FMR with micromagnetic simulations the validity of the common theory of spin-wave excitations can be tested. In summary, new paths will open up to tailor magnetic properties and interactions in complex ensembles of magnetic mirco-, hetero-, and nanostructures directly studied with element specificity and ultimate spatial and temporal resolution.


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